Locomotive fire-box



(No Model.) A 2 Sheets-Sheet 1. T. DELAMERE. Locomotive Fire Box.

No. 233,481. P ented Oct. 19, I880.

:ZEfc'g. 1.

N-FEIERS. PHO'I'D-UTH'E'GRAPMER, WASHINGTON. D C.

(No Model.) 2 Sheets-Sheet 2.

T. DE'LAMERE. Locomotive Fire Box.

No. 233,481. Patented Oct. 19,1880. 1 9- lhos. 17e Zawnere A669 6 2/: Invert/C07".

N. PETERS. FHOTO-LITHOGRAPNER, WLSKINGTON, J1 E i UNITED STATES PATENT OFFICE.

THOMAS DELAMERE, OF CHICAGO, ILLINOIS.

LOCOMOTIVE Fl RE-BOX.

SPECIFICATION forming part of Letters Patent No. 233,481, dated October 19, 1880.

Application filed April 26, 1880. (No model.)

To all whom it may concern:

Be it known that I, THos. DELAMERE, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locomotive Fire-Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification, in which- Figure 1 is a side section of engine, showin g the fire box; Fig. 2, a cross section through at w of Fig. 1; Fig. 3, a perspective of the fire-box; Fig. 4, a longitudinal section on line y y of Fig. 5 through the box and boiler, showing T-rails in the crown; and Fig. 5, a cross-section on the line a" m of Fig. 4.

My invention has reference to the construction of locomotive fire-boxes, the object being to prevent leakage at the corners when the parts are united.

It consists in cutting away the corners of the side sheets next to the mud-ring and turning the tube-sheet at the lower corners in the direction of the cut of the side sheets, so as to avoid two thicknesses of material, and also rivets at the corners of the fire-box next to the mud-ring, thereby making a close joint at the corners of the fire-box and mud-ring, preventing leakage at that point.

When the rivets are run the length of the side, door, and tube sheets at the corners there are two thicknesses of metal at the joint of the sheets at the corners, rendering it difficult to make a close joint and to prevent leakage.

In the accompanying drawings, Aindicates the side sheets of the box; B, the door-sheet; O, the tube-sheet, and D the crown.

The crown consists of the two sheets D and E, the sheet E being corrugated, as shown, and the two sheets braced by bolts or rods F. The crown is secured in the usual way to the sides of the box, and the box secured in the usual way to the shell of the boiler.

Instead of running the edges of the side sheets straight down the corner of the box to the mud-ring, I cut off the lower corners, as seen in Figs. 1 and 3, and extend the lower turned corners of the door and tube sheets, as shown in the same figures, and rivet down the corners of the box to the point where the side sheets are cut away, and from that point to the bottom of the box I rivet obliquely to the corners, or rivet with the line of the cut, as illustrated in Figs. 1 and 3.

By thus constructing and riveting the sides of the box there is only one thickness of material at the lower corners next to the mudring. and the joint made close, thereby preventing leakage at the corners where the sides and ring meet.

By constructing the crown -sheet with a corrugated top, as shown in the drawings, the crown-sheet is greatly strengthened, and the capacity for water and steam very much increased.

Instead of connecting the box to the shell of the boiler, as illustrated in Figs. 1, 2, and 3, I prefer to secure it as illustrated in Figs. 4 and 5, where there are shown several T- irons, G, running the length of the crown and bolted thereto, and made with a series of holes transversely through the same, so that pins may be passed through them, and the bifurcated ends of the stays or braces H, which are likewise connected to similarly-constructed irons bolted to the under surface of the boiler above the crown.

By constructing the parts as just described I am enabled to apply more braces, thereby strengthening the connection between the crown and boiler; and by the T-irons the crowusheet is better braced than by the employment of the means illustrated in Figs. 1, 2, and 3. I am also enabled to change the curves or corrugations of the crown so that more bolts or rods may be used.

1. The side sheets of the fire-box having their lower corners cut away, as shown and described, for the purpose set forth.

2. The door and tube sheets of n fire-box 5 having the lower corners extended inwardly, as shown and described, for the purpose set forth.

3. A fire-box having the side, door, and tube sheets toward the lower ends riveted on 

